From 2e3687c60c5c9720992a7cebf9493ec2d28a1cf6 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 11 Dec 2025 17:16:37 +0100
Subject: [PATCH] mdlinkcheck: only look for markdown links in markdown files

It finds debug outputs in source code otherwise.

Output the whitelist "warnings" to stderr to better allow us to count
URLs with `./mdlinkcheck --dry-run | wc -l`.

Closes #19938
---
 scripts/mdlinkcheck | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/scripts/mdlinkcheck b/scripts/mdlinkcheck
index bd54d96fe2..4ee0b53752 100755
--- a/scripts/mdlinkcheck
+++ b/scripts/mdlinkcheck
@@ -158,9 +158,12 @@ sub findlinks {
     open(F, "<:crlf", "$f") ||
         return;
 
+    # is it a markdown extension?
+    my $md = ($f =~ /\.md$/i);
+
     while(<F>) {
         chomp;
-        if(/\]\(([^)]*)/) {
+        if($md && /\]\(([^)]*)/) {
             my $link = $1;
             #print "$f:$line $link\n";
             storelink($f, $line, $link);
@@ -209,7 +212,7 @@ for my $f (@files) {
 
 for my $u (sort keys %whitelist) {
     if($whitelist{$u} == 1) {
-        printf "warning: unused whitelist entry: '$u'\n";
+        printf STDERR "warning: unused whitelist entry: '$u'\n";
     }
 }
 
-- 
2.47.3